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Chronic renal disease is an important clinical problem in dogs. Until recently, diffuse renal fibrosis with chronic renal failure has been attributed mainly to chronic interstitial nephritis, itself considered to be the end stage of acute leptospiral nephritis. A clinical and morphological analysis of eight cases of chronic glomerulonephritis is described and a comparison made with eight dogs suffering from severe chronic interstitial nephritis. Clinically and biochemically, the two diseases were virtually indistinguishable, both resulting in uraemia. A possible distinguishing feature of chronic interstitial nephritis was the anaemia which was absent from chronic glomerulonephritis cases. Morphologically, the two diseases appeared to be distinguishable on three grounds; the pattern and severity of fibrosis, the degree of fibrin deposition and the immunofluorescence findings.
Vet Rec 1976 Apr 10
PMID:Chronic renal failure in dogs: a comparative clinical and morphological study of chronic glomerulonephritis and chronic interstitial nephritis. 127 39

Acute tubulo-interstitial nephritis was diagnosed post mortem when a dog died four days after surgery for a femoral head resection. Possible causative factors associated with halothane anaesthesia, flunixin meglumine analgesia and prophylactic antibiotic therapy with trimethoprim-sulphadiazine are discussed. It is concluded that death was due to renal failure associated with tubulo-interstitial nephritis as a result of a combination of ischaemic and toxic events.
Vet Rec 1992 Aug 15
PMID:Acute tubulo-interstitial nephritis in a dog after halothane anaesthesia and administration of flunixin meglumine and trimethoprim-sulphadiazine. 146 25

Acute renal failure was diagnosed by clinical, necropsy and histological criteria in 39 flocks (20 low ground, 13 hill and six marginal upland) in areas served by six veterinary investigation centres. Forty-eight lambs of 12 different breeds or crosses were investigated. The mean age of affected lambs was 38 days (range seven to 84 days); 21 lambs (44 per cent) were aged seven to 28 days, while only eight (17 per cent) were older than two months. Mortality in clinically affected lambs was almost 100 per cent, with no response to various treatments. Histological examination showed that 40 lambs (83 per cent) had nephrosis, while the rest had toxic tubular necrosis, interstitial nephritis or tubular damage associated with oxalate crystal deposits. Only about half of the lambs had any evidence of enteric infections or enteropathy. Acutely ill lambs had azotaemia, haemoconcentration and proteinuria; some lambs had glycosuria or haematuria. Samples of plasma from 22 lambs with nephrosis were compared with similar samples from 82 incontact but asymptomatic lambs. The clinically affected group had significantly elevated plasma urea, creatinine, total protein, globulin, phosphorus and chloride concentrations and significantly reduced plasma calcium concentrations compared with healthy lambs. Affected lambs had a significant reduction also in the calcium:phosphorus ratio. No significant differences between groups was found in plasma concentrations of albumin, glucose, lactate, glycerol, creatine kinase, alkaline phosphatase, sodium, potassium or magnesium.
Vet Rec 1989 Jan 07
PMID:Acute nephropathy in young lambs. 291 11

A survey of the prevalence and type of renal disease was carried out at a Dublin abattoir in 1979-80. Of 4166 cattle surveyed, 173 (4.2 per cent) had kidneys rejected for gross abnormalities. The rejection rate was 7.7, 1.7, 2.2 and 28 per cent for cows, bullocks, heifers and bulls, respectively. The most common reason for rejection was focal interstitial nephritis (60.1 per cent of rejected kidneys). Other lesions included cysts (26.0 per cent), pigmentation (6.4 per cent), pyelonephritis (3.5 per cent), amyloidosis (2.9 per cent), glomerulonephritis (0.6 per cent), renal atrophy (0.6 per cent) and agonal haemorrhage.
Vet Rec 1983 Jul 16
PMID:Abattoir survey of bovine kidney disease. 660 62

Alloxan is known to induce diabetic renal changes as well as causing nephrotoxic alterations. However, no ultrastructural study has been performed to differentiate diabetic verses toxic affects of alloxan to the tubule and/or glomerulus. Therefore the present study used the "protected" kidney model to prevent one kidney from being exposed to the alloxan while allowing the other to receive the drug immediately. In all experimental animals the right renal hilum was gently occluded for 5 minutes and then released. This was performed prior to the injection of alloxan. Subsequently, the left renal hilum was occluded at the time of, and for 5 minutes after, alloxan administration (40 mg/kg i.v.). The experimental rats were divided into three groups: untreated diabetics, diabetics treated with protamine-zinc-insulin, and alloxan-treated rats that failed to become diabetic. Three groups of controls were included: one group received an equal volume of saline diluent as the experimental rats but no clamping of either renal hilum; another group received the saline and had the left renal hilum occluded for 5 minutes; and a third group had both the right and left renal hila occluded. All animals were followed and sacrificed after 9 weeks. Endogenous creatinine clearance did not change among groups. Alloxan-treated nondiabetic rats displayed marked interstitial nephritis in unprotected kidneys, while protected kidneys were normal. The diabetic state resulted in mesangial proliferation and focal glomerular basement membrane thickening as well as glomerular capillary endothelial abnormalities and visceral epithelial foot-process fusion. The endothelial changes consisted of focal areas showing a reduction in the size of endothelial fenestrae. All glomerular changes were ameliorated by insulin treatment. We conclude: 1) alloxan per se is distinctly nephrotoxic; and 2) the glomerular endothelium and epithelium are involved early in the course of experimental diabetes.
Anat Rec 1984 Jan
PMID:The effect of alloxan, and alloxan-induced diabetes on the kidney. 671 36

Detailed pathological and virological examinations were carried out on 25 cetaceans found stranded between 1990 and 1993 on the coasts of six Italian regions (Latium, Tuscany, Apulia, Abruzzo, Veneto and Sicily). There were 16 striped dolphins (Stenella coeruleoalba), three bottlenosed dolphins (Tursiops truncatus), three Risso's dolphins (Grampus griseus), one rough-toothed dolphin (Steno bredanensis), one fin whale pup (Balaenoptera physalus), and one minke whale (Balaenoptera acutorostrata). Apart from parasitic diseases (44 per cent), the most frequently detected lesions were pneumonia (68 per cent), enteritis (44 per cent), non-purulent hepatitis (40 per cent), interstitial nephritis (32 per cent) and encephalitis (32 per cent). Morbilivirus infection was diagnosed by immunocytochemistry in four striped dolphins, two stranded on the coasts of Latium in 1991 and two on the coasts of Tuscany in 1993. Despite the presence of lesions consistent with morbilliviral pneumonia in two other striped dolphins stranded on the coast of Apulia in 1991, no morbillivirus antigen was demonstrated in the tissues of these animals. Anticanine distemper virus antibodies were detected in the serum of the adult minke whale found stranded on the coast of Tuscany in 1993. However, no viruses were isolated from the tissues of any of the 25 cetaceans.
Vet Rec 1995 Apr 29
PMID:Post mortem investigations on cetaceans found stranded on the coasts of Italy between 1990 and 1993. 763 79

Between 1989 and 1992, 22 Bernese mountain dogs (18 females and four males) aged between two and seven years, which had been suffering for some weeks from weight loss, anorexia, apathy, vomiting, polydipsia and polyuria, were examined. All of them had high blood urea nitrogen and serum creatinine concentrations, and many had hyperphosphataemia, hypercholesterolaemia, hypoproteinaemia and nonregenerative anaemia. All the dogs had very high protein: creatinine ratios in the urine, and macroproteinuria was identified by sodium dodecyl sulphate gel electrophoresis. The immunofluorescent titres against Borrelia burgdorferi, measured in 19 of the dogs, ranged between 256 and 32,768. In all cases, membrano-proliferative glomerulonephritis with concomitant interstitial nephritis was diagnosed. From an analysis of the dogs' pedigree it was concluded that the glomerulonephritis of these Bernese mountain dogs was inherited as an autosomal recessive trait and that its expression was influenced by a second gene locus with a sex-linked dominance exchange.
Vet Rec 1994 Apr 16
PMID:A new familial glomerulonephropathy in Bernese mountain dogs. 803 71

One kidney was taken from each of 100 pigs at slaughter; 50 had gross lesions of multifocal interstitial nephritis and 50 had no gross lesions. Forty-nine of the affected kidneys had lesions that were characterised by the presence of either a few randomly distributed or numerous widely disseminated pale foci, 1 to 3 mm in diameter, on the cortical surface (white-dotted kidneys). Microscopically, these focal inflammatory lesions often had a distinct lymphofollicular pattern (follicular nephritis). Lesions of chronic vasculitis were observed in 21 of the affected kidneys. Histologically, the control kidneys had only small and sparse inflammatory foci. Standard bacterial cultures of kidneys of both groups were not significant, and cultures for the isolation of leptospires were all negative. Virological examination of the kidney homogenates by PCR did not reveal any porcine reproductive and respiratory syndrome virus and only a few cases were positive for the porcine circovirus type 1. However, porcine parvovirus (PPV) and porcine circovirus type 2 (PCV-2) were detected in many kidneys of both groups but in a significantly higher proportion of the kidneys with interstitial nephritis. There was a significant association between the lesions and the presence of PPV and PCV-2 with odds ratios of 7.5 (P<0.0001) and 3.4 (P=0.0074), respectively, and the odds ratio increased to 22.7 (P<0.0001) when both viruses were identified in the same kidney. However, a subsample of kidneys taken from both groups were negative by immunohistochemistry for the presence of PPV and PCV-2 antigens.
Vet Rec 2002 Feb 02
PMID:Infectious agents identified in pigs with multifocal interstitial nephritis at slaughter. 1188 18

Sixty-nine tortoises, turtles and terrapins representing 28 species of the order Chelonia, class Reptilia were evaluated by endoscopy for renal disease. Under general anaesthesia, coelomic and/or extracoelomic endoscopic evaluations and biopsies of the kidney(s) were undertaken. Endoscopic approaches required a 2 to 4 mm skin incision in the prefemoral fossa, and minimal blunt dissection through the subcutaneous tissues. For the coelomic approach the coelomic aponeurosis of the transverse and oblique abdominal muscles was penetrated so that the cranioventral kidney(s) could be examined and biopsied. The extracoelomic approach required the endoscope to be advanced in a caudodorsal direction, between the coelomic aponeurosis and the broad iliacus muscle, so that the dorsolateral kidney(s) could be examined and biopsied. Both techniques were safe and effective for obtaining renal biopsies for histological examination and microbiological culture. Several renal pathologies were identified including glomerulonephrosis, tubulonephrosis, interstitial nephritis, uric acid accumulation, tubulonephritis, glomerulonephritis, renal oedema, glomerulosclerosis, nephrosclerosis, soft tissue mineralisation, and pyelonephritis. Several infectious conditions were identified, including a predominance of Gram-negative bacterial infections, two cases of hexamitiosis, and one case of mycobacteriosis.
Vet Rec 2004 Jan 17
PMID:Endoscopic renal evaluation and biopsy of Chelonia. 1475 2

An eight-year-old, entire female Pekingese cross, weighing 3.8 kg, had been inappetent with fever, depression, abdominal pain, vomiting and diarrhoea for seven days. The radiographic and ultrasonographic findings were consistent with glomerulonephritis, nephrolithiasis in both kidneys, bladder calculi and an accumulation of fluid in the left perinephric space. The clinical signs, together with the results of the diagnostic imaging, suggested that this fluid could be pus. A definitive diagnosis of a subcapsular abscess in the left kidney was established when this kidney was removed surgically. A histopathological examination of the kidney revealed a diffuse suppurative interstitial nephritis, membranous glomerulonephritis and an abscess invading the perinephric adipose tissue from the renal cortex. Twelve months after surgery the dog remains clinically stable, but owing to the disease of its remaining kidney its long-term prognosis is poor.
Vet Rec 2004 May 01
PMID:Left perinephric abscess associated with nephrolithiasis and bladder calculi in a bitch. 1514 2


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